
Internal Wall Insulation: a warmer and more efficient home
Internal wall insulation is a smart solution for homes that do not have cavity walls. It works by adding insulation boards or stud walls to the inside of external walls, helping to reduce heat loss and keep your home cosy all year round. Not only can this cut down on energy bills, but it also makes your home more comfortable and environmentally friendly.
Why should you have internal wall insulation?
If your home was built before the 1920s, it is likely to have solid walls instead of cavity walls. These types of walls lose heat much faster, meaning you may find it harder to keep your home warm in winter. Internal wall insulation creates a thermal barrier, preventing heat from escaping and helping to maintain a steady indoor temperature.

The pros of having internal wall insulation
There are many benefits to installing internal wall insulation. You can enjoy a much warmer home with fewer draughts, which makes living spaces more comfortable throughout the year. It can lower your heating bills by keeping warmth inside for longer, while also reducing carbon emissions and your overall environmental impact. As an added bonus, internal wall insulation can improve soundproofing, making your home quieter and more private.
The cons of not having internal wall insulation
Without internal wall insulation, homes with solid walls can lose a significant amount of heat. This means you may find it harder to maintain a comfortable temperature indoors, particularly in colder months. As a result, your heating system has to work harder, which can lead to higher energy bills. It also means more wasted energy, increasing your household carbon footprint and making your home less environmentally friendly.

What schemes cover internal wall insulation?
Both the ECO4 scheme and the Great British Insulation Scheme are designed to make insulation more affordable for households across the UK. Internal wall insulation is covered under both schemes, giving homeowners and tenants access to funding or free installations depending on eligibility. This can significantly reduce or even remove the upfront cost of having the work carried out.
What’s included in the ECO4 and Great British Insulation Scheme
Both the ECO4 scheme and the Great British Insulation Scheme are designed to help households improve their energy efficiency, making homes warmer and cheaper to heat. Internal wall insulation is one of the key measures covered under both programmes, but the support does not stop there.
Depending on your circumstances, ECO4 can also include free or subsidised loft insulation, solid wall insulation, boiler upgrades, and other energy saving measures to help lower household bills and reduce carbon emissions.
The Great British Insulation Scheme has a slightly different focus, with a particular emphasis on insulation. This can include cavity and internal wall insulation, loft insulation, and in some cases room-in-roof insulation.
The aim is to make the biggest difference to households by tackling heat loss through walls and roofs, which are responsible for a large proportion of wasted energy. Both schemes ensure that homeowners and tenants can access improvements without the financial burden of paying full installation costs.
How do I know if I qualify?
Eligibility for internal wall insulation under ECO4 and the Great British Insulation Scheme depends on a few key factors. For ECO4, the scheme is mainly aimed at households on lower incomes, those receiving qualifying benefits, or people living in homes with a low energy performance rating. The goal is to support those most at risk of fuel poverty and to provide essential upgrades that make everyday living more affordable.
The Great British Insulation Scheme works slightly differently. It is open to a wider group of households, including those in certain council tax bands, with the aim of helping more people across the country cut energy costs. Your property will also need to be suitable for internal wall insulation, which will be assessed before any work goes ahead.
If you are not sure which scheme you may qualify for, the best step is to check your eligibility. Many households are surprised to find they qualify for free or heavily subsidised improvements, even if they do not receive benefits.
Ready to find out? Get in touch today, have a chat and we can help answer any questions you may have.